Brand Name: Irwin *Sub Brand: Unibit *Material: High Speed Steel *Shank Type: Hex *Drill Bit Diameter: 3/16 - 1/2 in. *Product Type: Step Drill Bit *Number of Pieces: 1 pc. *Application: Stainless Steel, Copper, Brass *Shank Diameter: 1/4 in. *Packaging Type: Carded *Shank Length: 0.1875 in. *Discovery ACC, NBR, SUP